Seamless steel yeeb nkab khoom: Seamless steel yeeb nkab yog ua los ntawm steel ingot los yog steel tube billet los ntawm perforation rau hauv rough tube, thiab ces kub dov, txias dov los yog txias drawn. Cov khoom siv feem ntau yog ua los ntawm cov pa roj carbon zoo xws li 10,2030, 35, ib.45, low alloy structural steel xws li16 Mn, 5MnV lossis hlau alloy xws li 40Cr, 30CrMnSi, 45Mn2, 40MnB los ntawm kub dov lossis txias dov. Cov kav dej tsis sib haum ua los ntawm cov hlau tsis tshua muaj xws li 10 thiab 20 feem ntau yog siv rau cov kav dej xa dej.
Feem ntau, cov txheej txheem ntawm cov kav dej seamless steel tau muab faib ua ob hom: txheej txheem kos duab txias thiab txheej txheem kub dov. Cov hauv qab no yog cov ntsiab lus ntawm cov txheej txheem ntws ntawm cov kav dej txias seamless steel kav thiab kub dov seamless steel kav:
Cold-draw (txias-dov) seamless steel yeeb nkab txheej txheem: raj billet npaj thiab tshuaj xyuas → tube billet cua sov → perforation → raj dov → steel yeeb nkab reheating → sizing (txo) txoj kab uas hla → tshav kub kho → tiav tube straightening → tiav → tshuaj xyuas (tsis yog -kev puas tsuaj, lub cev thiab tshuaj lom neeg, tshuaj xyuas lub rooj zaum) → cia
Cold-rolled seamless steel yeeb nkab billets yuav tsum xub raug rau peb-yob nruam dov, thiab sizing xeem yuav tsum tau ua tom qab extrusion. Yog tias tsis muaj cov lus teb tawg rau ntawm qhov chaw, lub raj puag ncig yuav tsum tau txiav los ntawm lub tshuab txiav thiab txiav rau hauv cov pob zeb nrog qhov ntev txog li ib meter. Tom qab ntawd nkag mus rau cov txheej txheem annealing. Annealing yuav tsum tau pickled nrog acidic kua. Thaum lub sij hawm pickling, xyuam xim rau seb puas muaj cov npuas loj ntawm qhov chaw. Yog tias muaj npuas ntau, nws txhais tau hais tias qhov zoo ntawm cov yeeb nkab steel tsis ua raws li cov qauv sib xws.
Kub dov (extruded) seamless steel yeeb nkab txheej txheem: round tube billet → cua sov → perforation → peb-yob oblique dov, nruam dov los yog extrusion → raj tshem tawm → sizing (los yog txo) txoj kab uas hla → txias → billet raj → straightening → dej siab kuaj (lossis nrhiav qhov tsis haum) → kos npe → khaws cia
Kub dov, raws li lub npe implies, muaj qhov kub thiab txias rau lub dov daim, yog li lub deformation kuj yog me me thiab ib tug loj deformation npaum li cas yuav ua tau tiav. Lub xeev tus me nyuam ntawm kub dov seamless steel kav yog feem ntau kub-dov thiab kub-kho ua ntej xa khoom. Cov khoom siv lub raj raug tshuaj xyuas thiab qhov tsis xws luag raug tshem tawm, txiav mus rau hauv qhov xav tau ntev, nruab nrab ntawm lub ntsej muag kawg ntawm lub perforated kawg ntawm lub raj, thiab tom qab ntawd xa mus rau lub qhov cub cua sov kom sov thiab perforated ntawm lub perforator. Thaum perforating, nws tig thiab txav mus rau pem hauv ntej tsis tu ncua. Nyob rau hauv qhov kev txiav txim ntawm cov chais thiab lub taub hau, ib kab noj hniav maj mam tsim nyob rau hauv lub raj, uas yog hu ua ib tug ntxhib raj. Tom qab lub raj raug tshem tawm, nws raug xa mus rau lub tshuab tsis siv neeg lub raj dov rau ntxiv dov, thiab tom qab ntawd cov phab ntsa tuab tau hloov kho los ntawm lub tshuab leveling, thiab txoj kab uas hla yog txiav txim siab los ntawm lub tshuab sizing kom tau raws li qhov yuav tsum tau ua. Tom qab kub dov kev kho mob, ib qho kev sim perforation yuav tsum tau nqa tawm. Yog hais tias lub perforation txoj kab uas hla loj heev, nws yuav tsum tau ncaj thiab kho, thiab thaum kawg sau thiab muab tso rau hauv cia.
Kev sib piv ntawm cov txheej txheem kev kos duab txias thiab cov txheej txheem kub dov: Cov txheej txheem txias dov yog qhov nyuaj dua li cov txheej txheem kub dov, tab sis qhov zoo ntawm qhov chaw, qhov tsos, thiab qhov tseeb qhov tseeb ntawm cov ntawv txias-dov hlau yog zoo dua li cov phaj kub dov, thiab cov khoom thickness yuav thinner.
Qhov loj me: Sab nraud ntawm cov yeeb nkab kub dov seamless feem ntau ntau dua 32mm, thiab phab ntsa thickness yog 2.5-200mm. Sab nraud txoj kab uas hla ntawm cov yeeb nkab txias-dov seamless steel yeeb nkab tuaj yeem ncav cuag 6 hli, phab ntsa tuab tuaj yeem ncav cuag 0.25 hli, sab nraud ntawm cov yeeb nkab nyias nyias tuaj yeem ncav cuag 5 hli, thiab phab ntsa thickness tsawg dua 0.25 hli ( txawm tias tsawg dua 0.2 hli), thiab qhov tseeb qhov tseeb ntawm qhov txias dov yog siab dua qhov kub dov.
Cov tsos mob: Txawm hais tias cov phab ntsa tuab ntawm cov yeeb nkab uas tsis muaj seamless steel feem ntau me dua li cov yeeb nkab kub dov seamless steel yeeb nkab, qhov saum npoo zoo li ci dua li cov tuab-walled kub dov seamless steel yeeb nkab, qhov saum npoo tsis dhau rough, thiab txoj kab uas hla tsis muaj ntau burrs.
Kev xa khoom raws li txoj cai: Cov kav dej kub-kuav los tiag yog xa mus rau hauv lub xeev kub-kuav los yog kub-kho, thiab txias-dov steel kav yog xa mus rau hauv tshav kub-kho lub xeev.